Friday, April 10, 2009

Guidelines For Mechanical Drawing - Become an Expert Draftsman

Well this time, I would like to have discussion on drafting skills. The days have gone using Drawing board, drafter,set square etc., to make a blue print Engineering Drawings. The technology advancement and innovation made Mechanical Engineers to work on CAD software to create Engineering Drawings. Yeah, this is the fact every industry is following it. But not to forget the traditional way of Making Mechanical Engineering Drawings. Mechanical drawings has set of lessons which will help you to learn about engineering drawings.

Mechanical drawing is entirely different from freehand drawing. In freehand drawing the artist takes a pencil and some paper and sketches roughly what he sees—whether it be a portrait, a landscape or a nude figure. In doing this he makes use of his creative ability—his artistic sense—as well as his knowledge of design and anatomy. If he is sufficiently creative and gifted, his drawing will be a "work of art" even though it will be far from an accurate representation of the real thing.

Technical men are sure to be in great demand, particularly in the field of electronics and electronic machinery, and in the building field. In all fields, whether in engineering, architectural or machine shop work, the draftsman is a very important person, for he is the middleman between the engineer and contractor; the architect and builder; the designing engineer and the machine shop mechanic.

mechanical drawing tips

Like every other important profession, drafting or mechanical drawing has many branches. The architectural draftsman confines himself to plans, elevations and detail sections of houses or buildings; he has little to do with cog-wheels, cams, levers, nuts and bolts and other parts of complicated machinery. He must know how to read blueprints, draw plans, perspectives, elevations and section details of moulding, trim and interior woodwork.

The mechanical draftsman has the most difficult job of all, for he must not only know a great deal about shop drawing, isometrics, tool design, belting, gearing and so on, but he must be especially precise in his work. His drawings of machine parts and tools must be accurate to the thirty-second, or sometimes the sixty-fourth, of an inch. These drawings are often done full-size and in great detail. The engineer designs a piece of machinery or a tool, gives a rough sketch of it, with all dimensions marked, to the draftsman who must represent it exactly as it will be when manufactured. His work is a pattern for the finished part, and he plays a vitally important role in engineering.

All draftsmen, regardless of what particular branch of drafting they are in, must know certain fundamentals. They must know how to use and take care of their instruments. They must know how to draw to scale, and to make accurate scale drawings from rough sketches. They must know how to read blueprints, how to lay out their drawings neatly, how to letter well, and how to make shop or working drawings.

Obviously, it is impossible, in a book of this size, to give all the information about all the branches of drafting and mechanical drawing. Each branch would fill a good-sized book all by itself. All that we aim to do here is to introduce you to mechanical drawing, instruct you how to use your instruments correctly, and how to draw simple and elementary' designs, shop drawings, perspectives and isometrics, neatly and accurately, to any scale. After you have mastered the lessons and other instruction in this book, and have done all the problems satisfactorily, you will be a self-made and competent junior draftsman who should be able to get a job in the drafting department of any engineering or architectural concern where advancement is sure to be rapid.


Courtesy Keuffel 8. Esser Co., N. Y.

Courtesy : Mechanicaldrawingstips